Dumbledore torturing the Death Eater? That's really unusual. Though I wonder why. Everything he wanted to learn he could learn by using Veritaserum.
P.S. Beauxbatons wasn't all-girls school in the books, only in the movie.

An interesting start. I'd like to see where you go with this. I'm not really a huge Evil!Dumbledore fan, so I'm hoping that he isn't "lyk ev1L" (LOLZ! !), but the characters seem pretty normal, so who knows.